Answer:
Its B and D
Step-by-step explanation:
If you have any questions use Math-way it realy helps
Answer:b
x=3-y/7
Multiple 7
7x=3-y
Subtract 3
7x-3=-y
Times both sides by negative 1
-7x+3
Answer: 19
Step by step:
15-(-4)
Negative* negative= positive
So.. negative 1 times -4=4
15+4= 19